Question

我试图使用带有args的python subprocess.call来调用shell脚本。我没有将args传递给shell脚本，但是脚本被调用没问题。这就是我所拥有的

prepend = str(prepend)
print "prepend = " + str(prepend)
filename = str(request.FILES['mdbfile'])
print "filename = " + str(filename)
PROJECT_ROOT = os.path.abspath(os.path.dirname(__file__))
print "PROJECT_ROOT = " + str(PROJECT_ROOT)
filename = str(PROJECT_ROOT) + '/%s' % filename
print "full_filename = " + str(filename)
cmd = '%s/buildcsvs.sh' % (PROJECT_ROOT)
print "full_cmd = " + str(cmd)
p = subprocess.call([cmd, filename, prepend], shell=True)
output = p.stdout.read()
print output

这里是shell脚本的样子

#${1} is the file name, ${2} is the prepend code
echo "mdb-export ${1} TEAM > \"${2}team.csv\""
mdb-export ${1} TEAM > "${2}team.csv"

这是输出的样子

prepend = 749176818
filename = 2011ROXBURY.mdb
PROJECT_ROOT = /Planner
full_filename = /Planner/2011ROXBURY.mdb
full_cmd = /Planner/buildcsvs.sh
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute   '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
mdb-export  TEAM > "team.csv"
Usage: mdb-export [options] <file> <table>

有谁知道我做错了什么？谢谢 - 感谢您的帮助

编辑：现在，我有这个：

print "full_cmd = " + str(cmd)
args = "%s %s" % (filename, prepend)
print "full_args = " + str(args)
(out, err) = Popen(cmd,  stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True).communicate(args)

并且看起来它没有成功完成对脚本的调用。

你知道为什么吗？

Answer 1

如果你传递shell=True args必须是一个字符串而不是一个列表：

In [4]: from subprocess import check_output

In [5]: check_output(['echo', '123'])
Out[5]: '123\n'

In [6]: check_output(['echo', '123'], shell=True)
Out[6]: '\n'

In [7]: check_output('echo 123', shell=True)
Out[7]: '123\n'

修改：而不是使用call和p.stdout.read，您应该使用Popen().communicate，这是为此目的而做的，它有助于避免死锁。

编辑²（上面的编辑回答）：

cmd = ' '.join([cmd, args])
(out, err) = Popen(cmd,  stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True, shell=True).communicate(None)

您必须将完整的命令行传递给Popen。 communicate的参数将写入process.stdin（process = Popen返回）。

带有args的Python subprocess.call

1 个答案: